<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>HTML5 表单属性</title>
</head>
<body>
    <form action="" name="form2">
        value：<input type="text" value="请输入"><br>
        placeholder：<input type="text" placeholder="请输入" 
        
        autofocus autocomplete="on" required><br>
        多文件上传：<input type="file" multiple><br>
        <input type="text" accesskey="q" value="快捷键"><br>

        <input type="submit" value="提交吧">
    </form>
    
</body>
</html>